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Finding the Fourth Proportional to 10,438.57, 15,657.85 and 4,890.88

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Solution

The fourth proportional to 10,438.57, 15,657.85 and 4,890.88 is: 7,336.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,438.57 : 15,657.85 = 4,890.88 : x
  2. Step 2: Convert to fraction form
    10,438.57/15,657.85 = 4,890.88/x
  3. Step 3: Cross multiply
    10,438.57x = 15,657.85 × 4,890.88
  4. Step 4: Simplify right side
    10,438.57x = 76,580,587.12
  5. Step 5: Solve for x
    x = 76,580,587.12/10,438.57
  6. Step 6: Final answer
    x = 7,336.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.